– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 4 pm Fri 10 Apr Local TimeUpdates in: hr min sUpdate imminent
Issued: 4 pm Fri 10 Apr Local Time
Updates in:
Update imminent hr min s
Issued: 4 pm Fri 10 Apr Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryModerate rain (total 13mm), heaviest on Sat afternoon. Very mild (max 17°C on Fri afternoon, min 4°C on Mon morning). Wind will be generally light. | Days 5–7 Weather SummaryMild with heavy rain (total 24mm), heaviest during Tue afternoon. Becoming colder with a moderate fall of snow heaviest on Tue night. Freeze-thaw conditions (max 6°C on Mon afternoon, min -2°C on Wed night). Wind will be generally light. | ||||||||||||||||
Fri 10 | Saturday 11 | Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  |  | | | | | | | |  |  | |  | |
cloudy | rain shwrs | light rain | mod. rain | light rain | rain shwrs | light rain | rain shwrs | rain shwrs | light rain | light rain | mod. rain | mod. rain | heavy snow | light snow | light snow | some clouds | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
— | — | — | — | — | — | — | — | — | — | — | — | — | 12 | 2 | 1 | — | |
— | 0.6 | 0.4 | 5 | 1.4 | 0.2 | 1.2 | 3 | 1.6 | 1.6 | 3 | 8 | 10 | — | — | 1.1 | — | |
max °C | 17 | 13 | 10 | 8 | 7 | 8 | 10 | 8 | 5 | 6 | 4 | 2 | 3 | 2 | 1 | 2 | 0 |
min °C | 17 | 11 | 9 | 7 | 7 | 7 | 9 | 5 | 4 | 5 | 3 | 2 | 3 | -1 | 0 | 1 | -2 |
17 | 11 | 8 | 6 | 7 | 7 | 8 | 3 | 2 | 3 | 2 | -2 | -1 | -3 | -2 | -1 | -2 | |
2650 | 2500 | 2050 | 1750 | 1700 | 1800 | 1900 | 1550 | 1150 | 1200 | 950 | 900 | 1000 | 350 | 600 | 800 | 0 | |
Cloud base (m) | 3050 | 2600 | 1650 | 550 | 550 | 550 | 700 | 650 | 600 | 600 | 550 | 550 | 550 | 550 | 550 | 600 | 700 |
 | — | — | 6:24 | — | — | 6:22 | — | — | 6:20 | — | — | 6:18 | — | — | 6:16 | — | — |
 | 7:51 | — | — | 7:52 | — | — | 7:53 | — | — | 7:55 | — | — | 7:57 | — | — | 7:59 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Moderate rain (total 13mm), heaviest on Sat afternoon. Very mild (max 17°C on Fri afternoon, min 4°C on Mon morning). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
Mild with heavy rain (total 24mm), heaviest during Tue afternoon. Becoming colder with a moderate fall of snow heaviest on Tue night. Freeze-thaw conditions (max 6°C on Mon afternoon, min -2°C on Wed night). Wind will be generally light.
This table gives the weather forecast for South Twin Sister at the specific elevation of 500 m. Our advanced weather models allow us to provide distinct weather forecasts for several elevations of South Twin Sister. To see the weather forecasts for the other elevations, use the tab navigation above the table. For a wider overview of the weather, consult the Weather Map of Washington.